NINJA Japan eSIM

Name: NINJA Japan eSIM
Brand: NINJA eSIM

Not enough reviewsJapan specialist3 plans from $19.42

3 plans on Docomo and SoftBank. 5 GB for a week from US$23.42. Prices checked 13 Nov 2026.

Is NINJA eSIM good for Japan?

NINJA eSIM runs on Docomo and SoftBank, strong in all 10 areas on our coverage map, with good 4G at all 28 rural and mountain places. A week with 5 GB costs US$23.42, the 52nd cheapest of the 60 providers with a week plan. 5G on some plans. How we rank NINJA eSIM.

Go to NINJA eSIM

Japan plans

Shown in USD, converted from JPY at ECB rates of 12 Nov 2026

Data	Valid for	Network	5G	Price	Per GB	Compare
5 GB 5 days	5 days	NTT Docomo and SoftBank	Not stated	$19.42	$3.88	Compare
15 GB 60 days	60 days	SoftBank	Yes	$23.42	$1.56	Compare
50 GB 60 days	60 days	SoftBank	Yes	$45.12	$0.90	Compare

NINJA eSIM speed and data rules

NINJA eSIM doesn't say what happens when a plan's full-speed data runs out.

NINJA eSIM: “Speed throttled after data limit (128kbps)” Source

NINJA eSIM ratings from customer reviews

2 reviews on Trustpilot, written 26 Dec 2025 to 2 Nov 2026. 0 of them are about a trip to Japan. Each rating needs at least 10 reviews that mention it.

NINJA eSIM ratings by aspect
Aspect	Rating	Reviews that mention it
Speed	Not enough reviews	1 review
Coverage	Not enough reviews	0 reviews
Setup	Not enough reviews	2 reviews
Support	Not enough reviews	1 review
Value	Not enough reviews	0 reviews
App	Not enough reviews	0 reviews
Data problems	Not enough reviews
Refund problems	Not enough reviews

NINJA eSIM speed tests in Japan

No published speed tests of NINJA eSIM in Japan.

How fast these networks are for their own customers

Ookla's median speeds for people on each network's own plans, H1 2026 unless marked.

NTT Docomo
Download
50.5 MbpsQ3 2025
Time on 5G
51.4%
SoftBank
Download
73.78 Mbps
5G download
153.55 Mbps
Time on 5G
41.4%
Latency
45 ms

Ookla speeds for each network's own customers
Network	Download	5G download	Time on 5G	Latency
NTT Docomo	50.5 MbpsQ3 2025	Not published	51.4%	Not published
SoftBank	73.78 Mbps	153.55 Mbps	41.4%	45 ms

Sources: Ookla Speedtest Connectivity Report H1 2026 via TelecomLead, 17 Sept 2026; Ookla Speedtest Intelligence Q3 2025 via TelecomsTechNews, 15 Dec 2025.